[ubuntu-ar] No levanta audio onboard Realtek en placa Intel G31TM-P21

[Matias Varela]

Hola listeros.. Hoy prende la maquina y me llevo la sorpresa que el 
audio no andaba, voy a sonido y no hay hardware reconocido. Siempre 
anduvo perfecto. Es más, yo cambie de mother, micro y memoria, y no tuve 
que hacer nada con el sonido, anduvo desde el primer momento.
Googleando un poco, encontre como solucion agregar *"options 
snd-hda-intel model=6stack"* al /etc/modprobe.d/alsa-base.conf pero no 
soluciono el problema.
Salida del lspci:

00:00.0 Host bridge: Intel Corporation 82G33/G31/P35/P31 Express DRAM 
Controller (rev 10)
00:02.0 VGA compatible controller: Intel Corporation 82G33/G31 Express 
Integrated Graphics Controller (rev 10)
*00:1b.0 Audio device: Intel Corporation 82801G (ICH7 Family) High 
Definition Audio Controller (rev 01)*
00:1c.0 PCI bridge: Intel Corporation 82801G (ICH7 Family) PCI Express 
Port 1 (rev 01)
00:1c.1 PCI bridge: Intel Corporation 82801G (ICH7 Family) PCI Express 
Port 2 (rev 01)
00:1d.0 USB Controller: Intel Corporation 82801G (ICH7 Family) USB UHCI 
Controller #1 (rev 01)
00:1d.1 USB Controller: Intel Corporation 82801G (ICH7 Family) USB UHCI 
Controller #2 (rev 01)
00:1d.2 USB Controller: Intel Corporation 82801G (ICH7 Family) USB UHCI 
Controller #3 (rev 01)
00:1d.3 USB Controller: Intel Corporation 82801G (ICH7 Family) USB UHCI 
Controller #4 (rev 01)
00:1d.7 USB Controller: Intel Corporation 82801G (ICH7 Family) USB2 EHCI 
Controller (rev 01)
00:1e.0 PCI bridge: Intel Corporation 82801 PCI Bridge (rev e1)
00:1f.0 ISA bridge: Intel Corporation 82801GB/GR (ICH7 Family) LPC 
Interface Bridge (rev 01)
00:1f.1 IDE interface: Intel Corporation 82801G (ICH7 Family) IDE 
Controller (rev 01)
00:1f.2 IDE interface: Intel Corporation 82801GB/GR/GH (ICH7 Family) 
SATA IDE Controller (rev 01)
00:1f.3 SMBus: Intel Corporation 82801G (ICH7 Family) SMBus Controller 
(rev 01)
02:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. 
RTL8101E/RTL8102E PCI Express Fast Ethernet controller (rev 02)

gracias de antemano..
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